GeoffPeterson

Geoff Peterson is getting more and more advanced the longer he's on 'The Late Late Show' (Weeknights, 12:37AM ET on CBS). Remember when he first appeared with his stiff movements, robotic voice and limited vocabulary. He had only a few rote phrases he could repeat.

Now, he's doing celebrity impressions, and a pretty spot-on one of Regis Philbin. Unfortunately, Philbin didn't care for it at all.

"I thought he was having like an epileptic fit over here," Philbin said of Geoff's stammering impression. "I don't talk like that at all!"